Comtech EF Data CDM-760 - Manual (Page 65)

Rear Panel Connections Revision 2
CDM-760 Advanced High-Speed Trunking Modem MN-CDM760
3–17
3.3.3.2 DC Operation – Replace the Fuses
For DC operation, the unit requires two different fuses. The fuses are located on the rear panel
in the individual screw-in receptacles found below the terminal block (Figure 3-14).
Figure 3-14. Replace DC Fuses
WARNING – DEATH OR PERSONAL INJURY POSSIBLE
DISCONNECT THE POWER SUPPLY BEFORE PROCEEDING!
CAUTION – ALWAYS REPLACE THE FUSES WITH THE CORRECT TYPE AND RATING.
SEE FIGURE 3-12 FOR THE DC FUSE SPECIFICATIONS.
To replace the DC fuses (Figure 3-14), do these steps:
Step Task
1 Disconnect the power supply.
2 Unscrew either fuse holder from its receptacle.
3 Remove and replace the fuse(s):
• Use T3A (3 Amp) 250V fuses for modem operation (left-hand receptacle).
• Use T6.3A (6.3 Amp) 250V fuses when a Block Up Converter (BUC) is installed
(right-hand receptacle).
4 Screw either fuse holder into its receptacle